Abstract: A display apparatus, a glasses apparatus and a control method are provided. The display apparatus includes a display which displays a plurality of contents, an audio signal processor which generates a single audio signal by signal-processing a plurality of audio data which correspond to each of the plurality of contents, and a communicator which transmits the signal-processed single audio signal to a glasses apparatus.

Abstract: A method for synchronized playback of wireless audio and video is applicable to a playback system. The method for synchronized playback includes steps of receiving and processing multimedia data by the playback system, in which the multimedia data includes video data and audio data; wirelessly transmitting the audio data to a loudspeaker and meanwhile holding the video data for a threshold time; and finishing the transmission of the audio data when the threshold time is reached, so that the video data and the corresponding audio data are synchronously played. The method for synchronized playback can control the delay caused by the wireless audio transmission, thus achieving the objective of synchronously playing the audio and video data.

Abstract: A signal processing apparatus and method are provided. The signal processing apparatus adjusts the level of a certain signal from among sequentially input signals based on the levels of the signals, and the certain signal is one of signals input prior to the latest signal input to the adjusting unit. Accordingly, a storage cell is shared for lip-sync and AVC, resulting in reduced manufacturing costs, and enhanced stabilization of the signal and the rate of the stabilization of the signal.

Abstract: Techniques for synchronizing audio and video content for presentation to a user at a same rate are provided. Streams of content from two or more sources of media, each media source having an associated clock, are synchronized by a synchronizing component and processor with respect to a master clock. As well, techniques are provided for ensuring that output devices are synchronized at preview startup. That is, such techniques ensure that the output devices start playing the media at the same time as well as at the same rate.

Abstract: The present invention provides a streaming media data processing method. The method includes: based on a stream index in streaming media data, separating the streaming media data stream into audio stream data and video stream data and respectively buffering them in an audio stream data queue and a video stream data queue; respectively decoding audio data buffered in the audio stream data queue and video data buffered in the video stream data queue; based on a play callback timestamp of the decoded audio data and a system time of a streaming media playback equipment, determining an audio/video synchronization time; based on a comparison result between a video frame timestamp and a sum of the determined audio/video synchronization time and a video refresh time, processing and displaying each frame in the decoded video stream data according to a predetermined processing method in accordance with the comparison result.

Abstract: A method and a system for deriving visual rhythm from a video signal are described. A feature extraction module receives the video signal and extracts a two-dimensional feature from the video signal. A one-dimensional video feature computation module derives a one-dimensional feature from the extracted two-dimensional feature. A visual rhythm detector module detects a visual beat and a visual tempo from the one-dimensional feature.

Abstract: Some embodiments of the invention provide a method for synchronizing an audio stream with a video stream. This method involves searching in the audio stream for audio data having values that match a distinct set of audio data values and synchronizing the audio stream with the video stream based on the search. In some embodiments, the distinct set of audio data values is defined by a predetermined distinct tone. In other embodiments, the distinct set of audio data values is defined by audio data contained in the video stream.

Abstract: Systems and methods are described for synchronizing media data. A method of synchronizing media data includes receiving a reference acoustic fingerprint for a first media data, generating at least one acoustic fingerprint fragment from a portion of the first media data, comparing the at least one acoustic fingerprint fragment against the reference acoustic fingerprint and identifying a match, and synchronizing a second media data with the first media data based on the match.

Abstract: A picture conversion information supply section 130 calculates per frame an affine transformation parameter for picture conversion based on motion information about a moving picture. With reference to a reference picture, a picture conversion section 140 affine-transforms pictures making up the moving picture per frame using the calculated affine transformation parameters. Based on information indicating the center position, angle or scaling factor about the transformed pictures coming from the picture conversion section 140, a sound conversion information calculation section 190 calculates sound conversion information for converting the sound corresponding to the pictures. Based on the sound conversion information, a sound conversion processing section 200 controls the volume of each of the channels making up the sound, adds up the controlled sound of each channel, and outputs the result as output sound to speakers 220.

Abstract: Technologies are generally described for an audio playing scheme for digital billboard systems. In some examples, a method performed under control of a server may include receiving from an end device a control signal configured to indicate that the end device is located in a first predetermined area relative to a first digital billboard, identifying first video data currently displayed on the first digital billboard, determining first audio data corresponding to the first video data, and transmitting the first audio data to the end device based on the control signal.

Abstract: Presented herein is a method of presenting alternative audio content for an audio/visual content segment, such as a television program or a motion picture. In the method, the audio/visual content segment is received into a media content receiver. The audio/visual content segment includes primary visual content and primary audio content. A request to receive alternative audio content for the audio/visual content segment is transmitted. After transmitting the request, the alternative audio content is received into the media content receiver. The primary audio content is replaced with the alternative audio content to generate a revised audio/visual content segment. The revised audio/visual content is transferred for presentation to a user.

Abstract: In a system and method for verification of media content synchronization, the system may include a processor configured to perform a method including determining at least one similarity score of a copy of a master program based on a comparison of at least one signature of the copy with at least one signature of the master program.

Abstract: A device, system, and method may provide an audio component of a multimedia stream playing on a video monitor to one or more wireless computing devices. The extracted audio component of the multimedia content may be packetized into data packets and broadcast via a network such that the data packets can be received by the wireless computing devices and the audio component can be played by the wireless computing devices in synchronization with the visual component playing on the video monitor.

Abstract: Systems and methods according to the present invention provide methods, devices and systems for delivering media content to users. Broadcast audio and video streams can be synchronized for substantially simultaneous output by users. User feedback can be used to compose playlists of synchronized media.

Abstract: The present invention relates to a reception device and a method for the processing of multimedia data flows in said device comprising an interface to a first network and an interface to a second network, said method comprising the following steps: receive, from the first network, a first flow comprising multimedia data through a first transport protocol fitted with a first data synchronization system; receive, from the second network, a second flow comprising multimedia data through a second transport protocol fitted with a second data synchronization system, said second synchronization system being based on timing references different from those of the first data synchronization system; characterized in that said first and second flows transport the same synchronization information in the payload field of the first and of the second transport protocol, said synchronization information comprising data indicating the moment from which said multimedia data must be rendered; synchronize said first and second fl

Abstract: Methods and systems of operating an audio receiver may include a reference module configured to determine an input number of clocks per number of frames for an audio signal based on a reference clock and a specified number of frames. The audio receiver can also include a conversion module configured to re-sample the audio signal based on the input number of clocks per number of frames, the specified number of frames, and a specified number of clocks per number of frames.

Abstract: Provided herein is a method for synchronizing audio and video clock signals in a system. The method includes comparing, within a comparison module, a system video signal with the determined mathematical relationship to produce an adjustment signal. A system video reference signal is updated with the adjustment signal to produce an updated intermediate signal.

Abstract: A display in a first medium is controlled in response to commands generated by analyzing a second, contemporaneously available medium such as a video accompanied by a soundtrack having components in first and second domain. A transform is applied to signals in the first domain to generate signals in the second domain. The second domain signals are ordered according to a rule and used to produce a command signal or signals to produce time varying commands to vary at least one parameter of the video signal.

Abstract: A playback apparatus to play back content data including sound data includes an instruction operating portion to detect an instruction operation that instructs execution of prescribed processing, a hold operating portion to detect a hold setting operation that sets a state of not accepting the instruction operation to the instruction operating portion, a state control portion to set the state of not accepting the instruction operation to the instruction operating portion if the hold setting operation is detected by the hold operating portion, and a video processing portion to perform processing for displaying a video. If the video processing portion performs processing for displaying the video when the hold setting operation is detected, the state control portion controls the video processing portion to suspend at least a part of processing for displaying the video.

Abstract: In one aspect, audio streams are added to a mix until the mix is either complete (i.e., all audio streams have been added) or the mix is closed early (i.e., before the mix is complete). In another aspect, audio and video streams are synchronized by playing back the audio stream and then synchronizing display of the video frames to the playback of the audio stream.

Abstract: Techniques for synchronizing audio and video content for presentation to a user at a same rate are provided. Streams of content from two or more sources of media, each media source having an associated clock, are synchronized by a synchronizing component and processor with respect to a master clock. As well, techniques are provided for ensuring that output devices are synchronized at preview startup. That is, such techniques ensure that the output devices start playing the media at the same time as well as at the same rate.

Abstract: Methods, systems and computer program products for the synchronization of media streams. In an embodiment, a gross synchronization may first be performed on the media streams, using the broadcast delays of the streams. A refined synchronization may then be performed, taking advantage of corresponding visual or audio cues in each stream. In the event that the media streams represent the same content (e.g., the same content from different providers), matching momentary actions in the video media streams may be used to achieve refined synchronization. In the event that the media streams are different (e.g., different broadcasts of the same event), other cues may be used to achieve refined synchronization, where these other cues are part of the underlying event but independent of the particular broadcasts. Examples of these latter cues may be the sound of a referee's whistle or the crack of a bat hitting a baseball.

Abstract: The addition of temporal positions to an inverted index allows for temporal queries in addition to phrase queries. Store additional binary data for each term instance in the word-level index to prepare for searching in response to time-based queries from a user is accomplished through the use of Lucene's binary payload feature where the payload structure is defined for use in such searches. The pre-defined payload fields consist of three integers, which account for 12 extra bytes that must be stored for each term instance. A content database on the Master/Administrator server node provides the indexes for search into content in response to user events, returning results in JSON format. The search results may then be used to locate and present content segments to a user containing both requested search term results and the time location and duration within a content asset where the search term(s) is found.

Abstract: A receiver receives a stream of program data that includes: an image signal including a plurality of frames; a sound signal; and a playback timing signal used for synchronized playback of the image signal and the sound signal. A clock signal generation unit generates a clock signal that is independent of the playback timing signal. A reception timing signal acquisition unit acquires a reception timing signal indicating a receiving time of the program data. An analysis unit analyzes a trend of time-dependent variation in a detected difference between the reception timing signal and the playback timing signal. An adjustment amount generation unit generates an adjustment amount of the clock signal, which causes the difference between the reception timing signal and the playback timing to be constant, by referring to a trend of time-dependent variation analyzed by the analysis unit.

Abstract: An apparatus includes an image segment classification means that analyzes an input video to generate image segment groups each segment including image segments which include an identical object; a sound segment classification means that analyzes the input video to generate sound segment groups each segment including sound segments which include an identical object; an inter-segment group score calculation means that calculates a similarity score between each image segment group and each sound segment group; and a segment group correspondence decision means that decides, using the scores, whether or not an object in the image segment groups and an object in the sound segment groups are the same.

Abstract: A method and device for synchronizing audio/video signals is provided. A first and a second auxiliary signal are generated, wherein the first and the second auxiliary signals are pulse-shaped, and transmitted to a first and a second rendering device via a first and a second transmission path, respectively. The first audio/video output signal based on the first auxiliary signal and a second audio/video output signal based on the second auxiliary signal are outputted to a user. The user adjusts a delay of the first and/or second transmission path by synchronizing the first audio/video output signal with the second audio/video output signal.

Abstract: Some embodiments of the invention provide a method for synchronizing an audio stream with a video stream. This method involves searching in the audio stream for audio data having values that match a distinct set of audio data values and synchronizing the audio stream with the video stream based on the search. In some embodiments, the distinct set of audio data values is defined by a predetermined distinct tone. In other embodiments, the distinct set of audio data values is defined by audio data contained in the video stream.

Abstract: Presented herein is a method of presenting alternative audio content for an audio/visual content segment, such as a television program or a motion picture. In the method, the audio/visual content segment is received into a media content receiver. The audio/visual content segment includes primary visual content and primary audio content. A request to receive alternative audio content for the audio/visual content segment is transmitted. After transmitting the request, the alternative audio content is received into the media content receiver. The primary audio content is replaced with the alternative audio content to generate a revised audio/visual content segment. The revised audio/visual content is transferred for presentation to a user.

Abstract: A repeater is to be provided between a source device and a sink device and be used in a Lip-sync correction system that transmits a video signal and an audio signal from the source device to the sink device through a HDMI (High Definition Multimedia Interface) transmission path and reproduces the video signal and the audio signal in synchronous with them on the sink device. A communication from the source device to the sink device is defined as a downstream communication, and a communication from the sink device to the source device is defined as a upstream communication. The repeater includes a processor that receives the video signal and the audio signal through the upstream communication and the downstream communication and processes the received video signal and the received audio signal. The processor corrects deviation between the video signal and the audio signal.

Abstract: An apparatus temporal stops to output an exercise video, in response to determining that the request for temporal stop is received. The apparatus changes to a second audio volume of MIDI data by decreasing first audio volume by a pre-determined value and to a second exercise tempo by decreasing first exercise tempo by a pre-determined tempo value, in response to determining that a request for the temporal stop is received. The apparatus changes the second audio volume to the first audio volume, and the second exercise tempo to the first exercise tempo, in response to determining that a request for cancelling temporal stop is received. The apparatus restarts to output the exercise video representing the exercise motion based on the first exercise tempo.

Abstract: A display apparatus can avoid a load increase and display rapidly the video of a selected channel. The display apparatus includes a synchronizing unit. The synchronizing unit adjusts a timing, in which a video is displayed based on a predetermined reference frame received and decoded at first after channel selection, toward shifting earlier than a time of original display of the video based on a time information attached to the reference frame.

Abstract: A system and method for characterizing the relative offset in time between audio and video signals and enables the receiver of the audio and video signals to resynchronize the audio and video signals. Signal characterization data is dynamically captured and encoded into frames of video and audio data that is output by a television origination facility. The signal characterization data is extracted by the receiver and signal characterization data is recomputed for the received frames. The extracted signal characterization data is compared with the recomputed signal characterization data to compute the relative offset in time between the video and one or more audio signals for a frame. The receiver may then resynchronize the video and audio signals using the computed relative offset.

Abstract: A digital TV data processing method includes: (a) when a first channel digital TV data corresponding to a first channel is displayed, storing a second channel digital TV data corresponding to a second channel, the second channel digital TV data including an audio data and a video data; (b) when the first channel is switched to the second channel, decoding the video data of the stored second channel digital TV data at a first rate; and (c) when the decoding catches up a real-time second channel digital TV data corresponding to the second channel, decoding subsequent second channel digital TV data at a second rate and displaying a corresponding real-time decoding result; wherein the first rate is higher than the second rate.

Abstract: Systems and methods are disclosed to perform automated audio visual (AV) delay measurement for a system under test (SUT) by generating a dynamic AV test pattern to drive a source display device and one or more destination video display devices; detecting video output through at least one light sensor coupled to the one or more destination video display devices; digitizing the light sensor output; and performing multi-channel delay parameters analysis.

Abstract: There is provided a method of measuring delay variation between first and second elementary streams in a digital audiovisual data stream, comprising detecting and storing digital audiovisual data stream timestamp values, detecting and storing elementary stream timestamp values for the first and second elementary streams, interpolating the digital audiovisual data stream timestamp values and elementary stream timestamp values to form data sets having mutual sampling points, and subtracting the interpolated data set for the first elementary data stream from the interpolated data set for the second elementary data stream to form elementary stream difference values indicative of changes in delay over time between first and second elementary streams.

Abstract: In embodiments of an audio control module (318), audio data (310) is received from an audio data source (314) for output to an audio rendering device (316). An initialization input (326) can be received from a wireless audio headset (320) and, responsive to receiving the initialization input, the audio data (328) is communicated to the audio headset. The audio that would be generated from the audio data (322) at the audio rendering device (316) is also limited, such as by replacing the audio data (322) with null audio data, clearing audio data packets from the audio data (322), or by asserting a mute signal (336) to the audio rendering device.

Abstract: A signal control method of analyzing audio and video signals and interdependently enhancing each audio and video signal with regard to a multimedia input sequence including audio and video signal components are provided. The method of controlling audio and video signals includes: analyzing characteristics of components of the audio and video signals; interdependently modifying the audio signal and/or video signal according to the analyzed characteristics of components of the audio and video signals; and synchronizing the modified audio and video signals.

Abstract: A multi-channel audio signal converting device using a time-varying digital filter, an electronic system including the same, and a method of converting an audio signal using the time-varying digital filter are provided. The multi-channel audio signal converting device includes a first signal channel and a second signal channel configured to perform analog-to-digital conversion or digital-to-analog conversion using a first clock signal; and a first time-varying filter configured to synchronize a digital audio signal synchronized with a second clock signal different from the first clock signal with the first clock signal and to input the digital audio signal to the second signal channel when digital-to-analog conversion is performed or to synchronize an output signal of the second signal channel with the second clock signal when analog-to-digital conversion is performed.

Abstract: Video/audio production processing control synchronization apparatus and methods are provided. Processing control commands that are provided to a first installation of production processing equipment for controlling production processing of edit units of first production signals are echoed to another installation, or possibly multiple other installations, of production processing equipment. Timing information associated with the edit units is also provided to the other installation(s), to enable production processing of delayed production signals by the other installation(s) to be synchronized with the production processing by the first installation of production processing equipment. Multiple production processing equipment installations can be controlled and synchronized from a single control interface.

Abstract: A video delivery system includes a tablet computer and one or two detachable projectors. In one embodiment, video files are transferred from the tablet computer to the projectors when they are connected. The tablet computer is used as a remote control that controls an operation of delivering a video portion of the video file through the projectors and an audio portion through the tablet computer in a synchronized manner. In one aspect, the two projectors may be positioned to project two adjacent screens that present different portions of images. In another embodiment, positions of the projectors attached to the tablet computer may be adjusted to deliver desired screens.

Abstract: A start of execution of drawing processing of graphics data according to an application is delayed based on a time period required for image processing to be performed on image data according to a broadcast program image.

Abstract: A method for synchronizing of multimedia flows provided by different sources or transmitted via different transport protocols to a single receiving device or are designed to be rendered by different rendering devices. According to the invention, a reference datum representative of a datum of the first multimedia flow is provided in the second multimedia flow and associated with a datum of this second multimedia flow to synchronise the two flows. This reference datum constitutes a timing reference for the datum of the second multimedia flow with which it is associated. It is used to synchronize the two multimedia flows.

Abstract: A method is suggested enabling a person that watches a TV broadcasted live event to select and associate in a simple manner to the displayed video, an audio stream dealing with the same event but delivered by another source than the TV channel. The method relies on techniques allowing to know and to decode some available audio streams that deal with the same live event as the one currently displayed on TV and to synchronize these audio streams with the TV channel.

Abstract: In a system and method for verification of media content synchronization, the system may include a processor configured to perform a method including determining at least one similarity score of a copy of a master program based on a comparison of at least one signature of the copy with at least one signature of the master program.

Abstract: According to one embodiment, a transmitter including an AV transmission unit including a first transmission unit which transmits video/audio data according to a method 1, and a second transmission unit which transmits video/audio data according to a method 2, with a clock signal inserted in a data signal, and a communication unit which performs the information communication with the receiver by a predetermined standard signal, a communication channel switch unit which transfers a video clock signal to a clock terminal of an HDMI if the video/audio data is transmitted by the first transmission unit, or transfers a first predetermined standard signal output from the communication unit if the video/audio data is transmitted by the second transmission unit, while the communication channel switch unit transfers a second predetermined standard signal received by an HPD/RSV terminal of the HDMI even in transmission by any of the first and second transmission units.

Abstract: A signal processing device includes: a feature amount calculation unit calculating the respective feature amount of a first audio signal obtained through a first communication pathway and a second audio signal obtained through a second communication pathway corresponding to the first audio signal; an audio synchronization processing unit generating synchronization information of the first audio signal and the second audio signal based on the feature amounts calculated by the feature amount calculation unit; and an audio synthesis unit synthesizing the first audio signal with the second audio signal based on the synchronization information generated by the audio synchronization processing unit.

Abstract: A multimedia file and methods of generating, distributing and using the multimedia file are described. Multimedia files in accordance with embodiments of the present invention can contain multiple video tracks, multiple audio tracks, multiple subtitle tracks, a complete index that can be used to locate each data chunk in each of these tracks and an abridged index that can enable the location of a subset of the data chunks in each track, data that can be used to generate a menu interface to access the contents of the file and ‘meta data’ concerning the contents of the file. Multimedia files in accordance with several embodiments of the present invention also include references to video tracks, audio tracks, subtitle tracks and ‘meta data’ external to the file.

Abstract: Apparatus and method for synchronizing audio and video frames in a multimedia data stream. In accordance with some embodiments, the multimedia stream is received into a memory to provide a sequence of video frames in a first buffer and a sequence of audio frames in a second buffer. The sequence of video frames is monitored for an occurrence of at least one of a plurality of different types of visual events. The occurrence of a selected visual event is detected that spans multiple successive video frames in the sequence of video frames. A corresponding audio event is detected that spans multiple successive audio frames in the sequence of audio frames. The relative timing between the detected audio and visual events is adjusted to synchronize the associated sequences of video and audio frames.

Abstract: According to one embodiment, an electronic device including, a display, an audio output module, a transmission module, a first detection module, a second detection module, a third detection module, and a controller configured to control at least one of the timing of the transmission of the audio signal by the transmission module and the timing of the output of the first reproduction output by the audio output module in accordance with the time difference detected by the third detection module, and to switch whether or not to control the timing in accordance with the positional relationship between the electronic device and the partner device.

Abstract: A video signal and an audio signal are transmitted from a source device to a sink device in conformity with respective predetermined interfaces through respective transmission channels. The respective interfaces include bidirectional interface such as an HDMI and an IEEE1394. A controller acquires delay information (TLv) representing the total delay time of the devices connected to the transmission channels conforming to the bidirectional interface and corrects the difference in reproduction time between the video and audio signals by using the acquired delay information (TLv).